-precision drills used by dentists-pneumatic brakes (air brakes) used by buses, trucks, and heavy duty vehicles-tampers used to pack down dirt and gravel-lungs-nail gun-dentist chairs-your choice (approve with Mr. K)

Criteria:-explanation of pressure changes in the system-explanation of why a hydraulic system was used instead of a pneumatic system, or vice versa.-diagram/picture-logical flow of information